CN111847272A - Supporting method of tower crane for reconstruction of existing building - Google Patents
Supporting method of tower crane for reconstruction of existing building Download PDFInfo
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- CN111847272A CN111847272A CN202010882650.9A CN202010882650A CN111847272A CN 111847272 A CN111847272 A CN 111847272A CN 202010882650 A CN202010882650 A CN 202010882650A CN 111847272 A CN111847272 A CN 111847272A
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- tower crane
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- existing building
- truss support
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- 238000010276 construction Methods 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 8
- 238000009435 building construction Methods 0.000 abstract description 2
- 238000002407 reforming Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 238000003466 welding Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 238000005034 decoration Methods 0.000 description 3
- 230000000875 corresponding Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 230000001131 transforming Effects 0.000 description 2
- 238000004642 transportation engineering Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002965 rope Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/20—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures
- B66C23/208—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures with supporting couples provided from the side, e.g. by walls of buildings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
Abstract
A supporting method of a tower crane for reforming an existing building belongs to the technical field of building construction, wherein attachment frames are respectively arranged at different heights on the ground between the tower crane and the existing building; each attachment frame is composed of a tower crane attachment wall and a truss support frame, the tower crane attachment wall is fixed with a tower body of the tower crane, the truss support frame is fixed with a structural column inside an existing building, and the attachment wall and the truss support frame of each attachment frame are fixed with each other. The invention can ensure the construction quality of the tower crane, improve the stability of the tower crane, avoid the damage to the existing building structure, save the construction period and materials, and is safe and reliable.
Description
Technical Field
The invention belongs to the technical field of building construction, and relates to a construction technology for modifying an existing high-rise building.
Background
Along with the high-speed development of the construction industry, building products are continuously updated, most of existing buildings have functional defects, so that the existing buildings need to be subjected to modification operations such as partial dismantling and floor lowering operation, structural reinforcement or structural floor adding, and the like, and the problem of vertical transportation of modification engineering personnel and materials is primarily considered when the construction tasks are completed. Because the building is already put into use, how to complete the transformation operation while destroying the existing building as much as possible is a problem which needs to be considered in the construction.
Although in recent years, the tower crane attaching wall is additionally arranged in a mode of synchronously pre-embedding bolts or post-embedding bolts when a building main body is constructed in a high-rise building, convenience is left for supporting the tower crane by the tower crane attaching wall on the outer side of the existing building in the future transformation. Most high-rise buildings do not make some reservations.
Because existing high-rise buildings often exceed the free height of the tower crane, in order to ensure the safe use of the tower crane of the existing high-rise buildings, the traditional method is that a post-mounted beam-penetrating clamp plate is adopted for attachment, namely, the position of an attached wall connecting lug plate is positioned on a beam or a shear wall at the corresponding position of each tower crane attached wall according to parameters such as the attached wall angle and the like, the position of a hole on the beam or the shear wall is determined according to the position of a bolt hole on the lug plate, a steel plate with the thickness of about 10mm is arranged on the inner side of the beam or the shear wall after the hole is formed, a wall-penetrating bolt is sleeved in the bolt hole of the lug plate and the bolt hole. The method needs to open holes on the beam or the shear wall, and the structure of the building is damaged, so that the bearing capacity of the building is adversely affected, the overall safety of the building is affected, the outer wall decoration layer needs to be locally removed before the holes are opened, and the cost for repairing the outer wall decoration layer is increased.
Disclosure of Invention
The invention provides a supporting method of a tower crane for reconstruction of an existing building, which aims to not damage the outer wall of the existing building, save construction period, save materials and improve safety.
The technical scheme of the invention is as follows: attaching frames are respectively arranged between the tower crane and the existing building at different heights on the ground; each attachment frame is composed of a tower crane attachment wall and a truss support frame, the tower crane attachment wall is fixed with a tower body of the tower crane, the truss support frame is fixed with a structural column inside an existing building, and the attachment wall and the truss support frame of each attachment frame are fixed with each other.
The tower crane realizes the support through the plurality of attachment frames, does not need to damage the outer wall decoration and the main structural member compared with the traditional attachment of the post-positioned beam-penetrating clamping plate, and is more economic and reasonable. Because the truss support frame of attaching to the frame is fixed inside existing building, it is more firm to wear the beam splint to adhere to with traditional postposition to compare, and the security performance is higher, makes things convenient for the construction moreover. No matter attach the wall or the truss support frame all can be through design in advance, draw materials, then on-spot according to the picture welding, wear the roof beam splint with traditional rear and adhere to and compare more accurate in the aspect of size control, reduced the high altitude construction hidden danger, also can improve tower crane installation quality through the straightness that hangs down of the indoor regulation tower crane of existing building.
In a word, the tower crane construction quality can be ensured, the stability of the tower crane is improved, the damage to the existing building structure is avoided, the construction period and the materials are saved, and the tower crane construction method is safe and reliable.
In order to facilitate and quickly construct, the tower crane attachment wall of each attachment frame comprises a group of attachment frames and at least three attachment rods, the attachment frames are fixedly connected with the tower body, one end of each attachment rod is connected with the attachment frame, and the other end of each attachment rod is respectively connected with the truss support frame of the same attachment frame. The tower crane and the internal structural column of the existing building are reliably connected through the attachment frame, the attachment rod and the truss support frame, so that the tower crane can be stably and firmly erected outside the existing building.
The attachment frame and each attachment rod of the same attachment frame are arranged on the same horizontal plane, so that the horizontal load resistance can be greatly improved, and the attachment frame, the attachment rods and the tower body are in a vertical stress state.
The truss support frames of the attachment frames are arranged on the floor ground in the existing building through the base, the hoop is fixed on the internal structure column of the existing building, and the truss support frames and the hoop are welded and fixed. Compared with the traditional rear beam-penetrating clamping plate, the connection mode of clamping the poles is firmer in attachment and higher in safety performance.
The ear plates are respectively welded on the attachment frame and the truss support frame, and two tail ends of the attachment rod are respectively connected with the ear plates of the attachment frame and the ear plates of the truss support frame through bolts. Part of operations for installing the attachment rod can be carried out indoors, so that potential hazards of high-altitude operation are reduced; also can be through indoor regulation tower crane attachment bar control tower crane straightness that hangs down, improve tower crane installation quality. The mode of connecting through the bolt is favorable to combining the actual needs to adjust the contained angle between each attached rod on the horizontal plane and the truss support frame.
Each attaching rod is composed of at least two sections of rod pieces which are telescopically connected with each other, so that each attaching rod has the scalability within a certain range and can be better suitable for the distance between the attaching frame and the attaching frame through adjustment.
Drawings
FIG. 1 is a schematic vertical view of an existing building, a tower crane and the present invention.
Fig. 2 is a schematic view of the installation of the first attachment frame.
Detailed Description
Firstly, brief introduction of engineering:
as shown in fig. 1, in an office building a, an original tower is 31 floors above the ground and 3 floors below the ground, and the project is started in 2013 and 30-floor roofing is completed in 2015. The later reason limit for height problem needs to be reformed.
The improvement target is as follows:
1. and (3) removing the structural frame plate surfaces of 30 layers and 31 layers on the ground, and changing the structural frame plate surfaces into 29 layers on the ground.
2. The original main building is reserved by adopting a steel pipe concrete frame-concrete core tube structure column; 30. pouring is carried out again on 31 layers of plate surfaces and a top plate (with the building elevation of 125.25) of an elevator machine room, the thickness of a floor plate is 110mm, the concrete strength grade is C30, 30 layers (122.35 m) are roof layers, and 31 layers (126.35 m) are roof layers. And reserving and newly adding a part of steel beams of the original structure.
3. And a T6013 tower crane is arranged for vertical transportation of materials and the like.
The T6013 tower crane B is composed of four parts of a metal structure, a mechanical lifting device, an electrical lifting device and a hydraulic lifting device. The metal structure part mainly comprises: fixed foot, tower body, jacking sleeve frame, rotation, balance arm, crane boom, etc.; the mechanical part mainly comprises: a hoisting mechanism, a trolley luffing mechanism, a swing mechanism and the like; the electric part mainly comprises: the device comprises a switch cabinet, a resistor, a control screen, an operating platform and a safety protection device; the hydraulic jacking system mainly comprises: the oil tank, the radial plunger pump, the safety valve, the reversing valve, the high-low pressure limiting valve, the balance valve, the hydraulic oil cylinder and the like.
Due to the reasons of construction sites, the project requires that the tower crane B is installed with an arm length of 55 meters, the lifting capacity of the arm end is 1.70 tons, the standard section specification of the tower crane is 1600 x 2800, and the total height of the tower crane B is 148 m.
The foundation of tower crane B is arranged on the concrete foundation of the original TC7052 tower crane in the basement, foundation bolts are arranged in a chemical bar planting mode, a truck crane is firstly utilized to install a foundation section plus 13 section standard sections, then a first attachment frame C is installed at the position 29.4 m high (namely the 4 th floor on the ground), the engineering is upwards provided with a second attachment frame D on the 9 th floor, a third attachment frame E on the 14 th floor, a fourth attachment frame F on the 18 th floor, a fifth attachment frame G on the 23 th floor and a sixth attachment frame H on the 25 th floor along the height, and the six attachment frames are installed in total, as shown in figure 1.
After the first attachment frame is installed, the corresponding rotary part and the parts above the tower crane are installed. After the upper mechanism is installed, the tower crane cannot rotate and hoist, jacking and joint adding operation needs to be immediately carried out, an attachment device is arranged, and normal hoisting operation can be carried out when the tower crane is lifted to a preset working height of 148 m.
Secondly, mounting a first attachment frame:
the first attachment frame C is installed on the ground within the height range of the 4 th floor.
Fig. 2 is a top view of the first attachment frame after it is formed, and is described in detail below with reference to fig. 2.
1. And (3) manufacturing and installing a truss support frame 8:
the truss support frame 8 is placed inside the 4 th floor above the ground and as close as possible to the floor level.
According to the size of the designed part drawing of the truss support frame 8, the I-shaped steel is cut before being lifted up on the air outside the building, and parts required by the truss support frame are prepared.
The materials such as the truss support frame parts are transported to the inner part of the 4 th floor on the ground of the building opposite to the tower crane through a small crane or a vertical ladder normally used in the building.
And after the tower crane is installed to the maximum independent height for the first time, carrying out trial hoisting inspection to ensure the safe operation of the tower crane.
When one end of the I-steel enters the 4 th layer, the I-steel is slowly pumped into the building layer by manpower, and the tower crane hook is adjusted along with the pumping, so that the steel wire rope is ensured to be in a tightened state until the I-steel completely enters the layer.
Four long I-beams are used as a main frame structure of the truss support frame 8 and divided into an upper layer and a lower layer, short steel bars are welded between the four I-beams before the two layers, and the floor structure column 10 is enclosed between the two long I-beams on each layer, so that the truss support frame 8 of the first attachment frame is formed.
An attachment embedment is installed at the structural column 10. Through this adhere to built-in fitting at truss support frame 8's lower bottom welding base, the base is fixed in this floor, and the base can adopt pre-buried mode to be connected with the building, and the built-in panel can adopt Q235B material, and thickness is 25mm, and length is not less than 600mm, and the width is not less than 400 mm. The welding of the base and the embedded plate is recommended to adopt an E4316 welding rod, and the welding height is 18 mm. The base and the building can also be connected by bolts.
The truss support 8 is mounted by a pedestal within 1/3 of the storey structure column 10 from the root upwards.
And fixing a pair of anchor ears 9 on the structural column surrounded by the I-steel, and welding and fixing the outer ends of the anchor ears 9 and the truss support frame 8.
Two lug plates 7 are respectively welded on a truss support frame 8 facing the tower crane, and each lug plate 7 is provided with a pin hole.
2. Installing an attachment frame:
the attachment frame 2 is composed of four attachment frame beams welded to each other.
The attachment frame 2 is sleeved on the tower body 1 of the tower crane, the attachment frame 2 is tightly propped against the four main chords of the tower body 1 through the inner support rods and is tightly clamped with the web members of the tower body 1, and the four inner support rods are positioned on the same horizontal plane as much as possible. However, when the attachment frame and the inner stay bar are installed, if interference occurs on certain parts of the standard section of the tower body, the installation heights of the attachment frame and the inner stay bar can be properly adjusted, and the levelness of the inner stay bar is ensured not to exceed 1/100 of the length of the inner stay bar.
Ideally, the stay bar is perpendicular to the tower body, but in special cases, the stay bar may have a certain angle, but the angle is controlled within a certain range. The site is offset by the vertical offset of the inner brace and the length of the inner brace, that is, if the support rod is 100cm long, the offset of the tail end cannot be larger than 1 cm.
The inner support rod allows a gangboard for people to pass from the building to the tower crane to be erected, but the weight is strictly forbidden to be piled.
Two lug plates 4 are welded to two end portions of the attachment frame 2 facing the truss support frame 8, and each lug plate 4 is provided with a pin hole.
The two ear plates 7 on the truss support frame 8 and the two ear plates 3 on the attachment frame 2 are all on the same horizontal plane.
3. Installing an attaching rod:
each attaching rod 5 is formed by a rod piece, the rod pieces are connected with each other through a joint bolt piece to form a telescopic structure, and pin holes are formed in two ends of each attaching rod respectively.
The lengths of the three attaching rods 5 are adjusted according to the actual size of the scene through joint bolts, one ends of the two attaching rods are connected with one ear plate on the attaching frame 2 through a pin shaft by a bolt 4, and one end of one attaching rod is connected with the other ear plate on the attaching frame 2 by the bolt 4.
The other ends of the three attaching rods 5 are respectively connected with two ear plates 7 welded on a truss support frame 8 through window holes on a building by bolts 6.
When each auxiliary wall is installed, a theodolite is used for checking and ensuring that the plane formed by the auxiliary frame 2 and the three auxiliary rods 5 is perpendicular to the axial lead of the tower body, and the auxiliary frame 2 and the three auxiliary rods 5 are positioned on the same horizontal plane.
The verticality of the tower body is measured by a theodolite, and the three attaching rods 5 are respectively tightened or stretched, so that the verticality error in the attachment of the tower body is controlled within 2/1000.
Thirdly, installing other five attachment frames:
after the first attachment frame is finished, the tower crane starts to be jacked to the maximum height allowed by the cantilever, and the second attachment frame to the sixth attachment frame are sequentially mounted in the same way as the first attachment frame mounting method.
Claims (6)
1. The supporting method of the tower crane for reconstruction of the existing building is characterized in that: attaching frames are respectively arranged between the tower crane and the existing building at different heights on the ground; each attachment frame is composed of a tower crane attachment wall and a truss support frame, the tower crane attachment wall is fixed with a tower body of the tower crane, the truss support frame is fixed with a structural column inside an existing building, and the attachment wall and the truss support frame of each attachment frame are fixed with each other.
2. The method for supporting the tower crane for reconstruction of the existing building according to claim 1, wherein: each tower crane that attaches to frame attaches wall including a set of frame and at least three adhere to the pole, adheres to frame and body of tower fixed connection, every one end that adheres to the pole with adhere to the frame and be connected, every other end that adheres to the pole respectively with same truss support frame that attaches to the frame be connected.
3. The method for supporting the tower crane for reconstruction of the existing building according to claim 2, wherein: the attaching frame and each attaching rod of the same attaching frame are arranged on the same horizontal plane.
4. The method for supporting the tower crane for reconstruction of the existing building according to claim 2, wherein: the truss support frames of the attachment frames are arranged on the floor ground in the existing building through the base, the hoops are fixed on the structural columns in the existing building, and the truss support frames and the hoops are welded and fixed.
5. The method for supporting the tower crane for reconstruction of the existing building according to claim 2, wherein: the attaching frame and the truss support frame are respectively welded with the ear plates, and two tail ends of the attaching rod are respectively connected with the ear plates of the ear plates and the truss support frame through bolts.
6. The method for supporting the tower crane for reconstruction of the existing building according to claim 2 or 5, wherein: each attachment rod is composed of at least two sections of telescopically interconnected rods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010882650.9A CN111847272A (en) | 2020-08-28 | 2020-08-28 | Supporting method of tower crane for reconstruction of existing building |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010882650.9A CN111847272A (en) | 2020-08-28 | 2020-08-28 | Supporting method of tower crane for reconstruction of existing building |
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| CN111847272A true CN111847272A (en) | 2020-10-30 |
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| CN202010882650.9A Pending CN111847272A (en) | 2020-08-28 | 2020-08-28 | Supporting method of tower crane for reconstruction of existing building |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112978543A (en) * | 2021-02-07 | 2021-06-18 | 上海建工二建集团有限公司 | Wall attaching device and construction method thereof |
-
2020
- 2020-08-28 CN CN202010882650.9A patent/CN111847272A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112978543A (en) * | 2021-02-07 | 2021-06-18 | 上海建工二建集团有限公司 | Wall attaching device and construction method thereof |
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